saw this post off will richardson’s blog, and am attracted to it as i’m also a mindmap fan myself. MindMeister is the tool which Will has reviewed in his post. the free version allows up to 6 maps to be created, and a fee is required for unlimited map creations and export functions. just to note down that IHMC CmapTools is also a concept-mapping tool (not entirely equal to mind-mapping) and it also allows realtime online collaboration, something which i recalled we experimented when we did our 13th TecXplorers Gathering.